I'm not willing to risk my life to do something in an actual car that we did with Hot Wheels when we were five. And that's why I'm not British stuntman Steve Truglia. The UK wheelman somehow convinced his insurance company it would be okay for him to drive a Fiat 500 through a loop-de-loop as part of a Shell promotion in Holland.
Viewing the video, I was surprised at how slowly the car was going and how manageable Truglia makes it all look. Which makes me think this would be an awesome way to provide stop-free Manhattan intersections. Put up a loop-de-loop for the north-south traffic, and have an elevated east-west road threading the needle.